Is it better to observe at full moon or new moon?

It is true that vacations dates are seldom chosen according to the moon.... But if you can, try to avoid full moon. The sky is very bright, and in fact as soon as the moon is visible, galaxies are invisible. Planets or stars are no problems, star clusters too, we continue observing gaseous nebulae because we use special filters allowing their observations. Still all these objects are better looking when the sky is very dark. the tours which are just after new moon or just after full moon are also interesting because we can both enjoy a dark sky and see the moon during a part of the tour. The rising moon over the Andes is a very beautiful thing to see. During the tours when the moon is visible, it is possible to take images of it through our telescopes and your digital camera.